A former church youth mentor is being accused of sexually abusing two young boys, according to the Charlotte Observer.

Julio Andres “Andy” Castillo, 34, of South Carolina, is being accused of multiple counts of sexually abusing the two boys while they were under the age of 16. Castillo has been jailed without bond since February 29. Castillo met the boys at church, Episcopal Church of Our Saviour and also York Place, a place where troubled children received counseling. York Place closed in November.

According to prosecutors, Castillo had a very close relationship with the boys’ family, which include keys to their home and free access to the children.

The abuse went to such an extent that Castillo built a secret room in his attic especially to molest the children. The room included a bed with rings for rope, so he could tie them up, according to the Observer. The room was accessible only with a ladder.